[Fot] Spitfire 1147 (six-port) cylinder head primer, anyone?

[Herald948 at aol.com]

Can any of you of the early Spitfire persuasion give me a primer on the  
"good" and/or "better" cylinder heads? I'm really interested to know about  
casting numbers AND stamped numbers, what the differences are, why the 303014  
(casting number, I think) head was once banned in SCCA Production racing but is  
now allowed again and what's so special about that particular head...in short,  
any such details you'd care to share.
 
I know someone once told me that one or more of the 948cc heads was good as  
well; unfortunately, I lost the details on that in a long-ago computer  crash.
 
Thanks for any and all insights!  

--Andy  Mace

*Mrs Irrelevant: Oh, is it a jet?
*Man: Well, no ... It's not so  much of a jet, it's more your, er, Triumph 
Herald engine with wings.
--  Cut-price Airlines Sketch, Monty Python's Flying Circus (22)

Triumph 10 /  Herald / Sports 6 vehicle consultant, The Vintage Triumph 
Register: _http://www.vtr.org_ (http://www.vtr.org/) 

Check out the North  American Triumph Sports 6 (Vitesse 6) and Triumph Herald 
Database: _http://triumph-herald.us_ (http://triumph-herald.us/) 




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